import Vue from 'vue'
import Router from 'vue-router'

// in development-env not use lazy-loading, because lazy-loading too many pages will cause webpack hot update too slow. so only in production use lazy-loading;
// detail: https://panjiachen.github.io/vue-element-admin-site/#/lazy-loading

Vue.use(Router)

/* Layout */
import Layout from '../views/layout/Layout'

/**
* hidden: true                   if `hidden:true` will not show in the sidebar(default is false)
* alwaysShow: true               if set true, will always show the root menu, whatever its child routes length
*                                if not set alwaysShow, only more than one route under the children
*                                it will becomes nested mode, otherwise not show the root menu
* redirect: noredirect           if `redirect:noredirect` will no redirect in the breadcrumb
* name:'router-name'             the name is used by <keep-alive> (must set!!!)
* meta : {
    title: 'title'               the name show in submenu and breadcrumb (recommend set)
    icon: 'svg-name'             the icon show in the sidebar,
  }
**/

export const constantRouterMap = [
  { path: '/login', component: () => import('@/views/login/index'), hidden: true },
  { path: '/404', component: () => import('@/views/404'), hidden: true },

  {
    path: '/',
    component: Layout,
    redirect: '/teacher',
    name: 'Dashboard'
  },
  {
    path: '/subject',
    component: Layout,
    redirect: '/subject/tree',
    name: 'Subject',
    meta: { title: '课程分类管理', icon: 'eye' },

    children: [
      {
        path: 'tree', // /teacher/list
        name: 'SubjectTree',
        component: () => import('@/views/subject/tree'),
        meta: { title: '课程分类列表', icon: 'tree' }
      },
      {
        path: 'import',
        name: 'SubjectImport',
        component: () => import('@/views/subject/import'),
        meta: { title: '导入课程分类', icon: 'form' }
      }
    ]
  },
  {
    path: '/course',
    component: Layout,
    redirect: '/course/list',
    name: 'Course',
    meta: { title: '课程管理', icon: 'eye' },
    children: [
      {
        path: 'list', // /teacher/list
        name: 'CourseList',
        component: () => import('@/views/course/list'),
        meta: { title: '课程列表', icon: 'table' }
      },
      {
        path: 'save',
        name: 'CourseSave',
        component: () => import('@/views/course/form'),
        meta: { title: '发布课程', icon: 'form' }
      },
      {
        path: 'edit',
        name: 'CourseEdit',
        component: () => import('@/views/course/form'),
        hidden: true,
        meta: { title: '课程更新', icon: 'form' }
      }
    ]
  },
  {
    path: '/teacher',
    redirect: '/teacher/list',
    name: 'Teacher',
    component: Layout,
    meta: { title: '讲师管理', icon: 'eye' },
    children: [
      {
        path: 'list',
        name: 'TeacherList',
        component: () => import('@/views/teacher/list'),
        meta: { title: '讲师列表', icon: 'table' }
      },
      {
        path: 'create',
        name: 'TeacherCreate',
        component: () => import('@/views/teacher/form'),
        meta: { title: '添加讲师', icon: 'form' }
      },
      {
        path: 'edit/:id',
        name: 'TeacherEdit',
        component: () => import('@/views/teacher/form'),
        meta: { title: '编辑讲师', icon: 'form' },
        hidden: true
      }
    ]
  },
  {
    path: '/statistics',
    component: Layout,
    redirect: '/statistics/chart', // 访问/teacher跳转到哪个路由
    name: 'Statistics',
    hidden: false,
    meta: { 'title': '统计分析管理', 'icon': 'eye' },
    children: [
      {
        path: 'gen', // 子路由的路径需要和父路由拼接  /subject/tree
        component: () => import('@/views/daily/gen'), // 目标页面的本地路径
        name: 'StatisticsGen',
        meta: { 'title': '生成统计', 'icon': 'tree' }
      },
      {
        path: 'chart', // 子路由的路径需要和父路由拼接  /teacher/save
        component: () => import('@/views/daily/chart'), // 目标页面的本地路径
        name: 'StatisticsChart',
        meta: { 'title': '展示统计', 'icon': 'form' }
      }
    ]
  },
  { path: '*', redirect: '/404', hidden: true }
]

export default new Router({
  // mode: 'history', //后端支持可开
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRouterMap
})
